Final answer:
A locator created from a polyline feature class can be saved in a Windows folder.
Step-by-step explanation:
When an ArcGIS user creates a locator from a polyline feature class that exists in a feature dataset, the locator can be saved in a Windows folder. A locator is a special type of dataset that allows you to search for addresses, places, and other geographic information. It is typically saved as a separate file in a Windows folder so that it can be easily accessed and used in other ArcGIS projects.